Flat toe warmers have a thin design with a unique rounded toe and adhesive backing that sticks to the outside of your sock, or under or over your toes. Fits comfortably in shoes or boots. Up to 5 hours of heat. Safe, natural heat is environmentally friendly and odorless. Warmers are standard equipment for skiers, snowboarders, hunters, campers, hikers, birdwatchers, or anyone who enjoys outdoor activities. Impulse display contains (40) pouches per display box.